Hoisting apparatus



Patented Maj 20,

4 suns-swan 1.

4r .wwm, PETERS c A. E. NORRlS. HOISTI NG APPARATUS.

APPLICATION FILED JULY 11.1916.

Patented May 20, 1919.

4 SHEETSSHEET 2.

Inventor: flZmnENorni/s A. E. NORRIS.

HOISTING APPARATUS.

APPUCATION FILED IULY 11.1915

A V I flaw/0:1 ENorris;

OFFICE.

' ALMON E. NORRIS, OF BROOKLIN'E, MASSACI-IUSETTS.

HOISTING APPARATUS.

Application filed July 11, 1916. Serial No. 108,718.

To all whom it may concern Be it known that I, ALMON E. NORRIs, acitizen of the United States, and a resident of Brookline, county ofNorfolk, Commonwealth of Massachusetts, whose post-office address is 47Silk street, Brookline, Massachusetts, h.ve invented an Improvement inHoisting Apparatus, of which the following description, in connectionwith the accompanying drawings, is a specification, like characters onthe drawings representing like parts.

This invention relates to hoisting apparatus and more particularly tohoisting apparatus of the type employing a grab or bucket carried by atrolley or other traversed support. Apparatus of this type is commonlyused for hoisting coal, but may be employed if desired in the handlingof other materials. The most effective coal-handling ap paratus .of thisclass is usually equipped with independently operable motors, eitherelectric or pressure fluid, one motor being employed for operating thebucket and the other motor for operating the trolley, so that themovements of the trolley and bucket, while susceptible of coordinationunder suitable control, may be quite independent of each other as totime, direction and speed.

One object of the present invention is to provide a simple but effectivecontrol for coordinating the movements of the bucket and the trolley,such control being preferably operable by a single individual.

This and other objects of the invention will be best understood byreference to the following description of one specific embodimentthereof, while its scope will be more particularly pointed out in theappended claims.

In the drawings.

Figure 1 shows in side elevation a hoisting tower embodying one form ofthe invention;

Fig. 2 is a plan view on a somewhat enlarged scale showing thearrangement of operating levers and connections therefor;

Fig. 3 is a side elevation of the levers and connections Fig. 4. is anend elevation of the same;

Fig. 5 is a plan view partly in section showing the supporting base forthe operating levers;

Fig. 6 is a longitudinal, central section through the supporting base;

Fig. 7 is a side elevation of the lower end of the sidewise movableoperating lever;

' Specification of Letters Patent.

Patented May 20, 1919.

Fig. 8 is an elevation'in partial, central, longitudinal section showingthe trolley drum and the load brake therefor;

Fig. 9 is an end view of the brake member with the trolley drum; and VFig. 10 is a central, sectional elevation taken through the controllingvalve for the brake of the hoisting member.

Referring to the drawings, I have therein shown for illustrativepurposes one form of my invention as applied to a hoisting tower l ofthe steeple type carrying the later ally extending boom 2 which latterherein provides a trackway for the trolley carriage 3 by which thehoisting element, herein represented as the bucket or grab l, iscarried. The bucket 4 may be of any suitable or usual construction,being herein shown as of the well-known type employing a hold-' ing ropeor cable 5 by which the bucket is suspended and raised or lowered, andthe openin or closing rope or cable 6 by which the buc et jaws areopened or closed. These ropes pass upward over and about suitablesheaves on the trolley, thence obliquely upward and over the guidesheaves 8 near the top of the tower and thence downward to the operatingroom where they pass over and about and are secured to suitable windingdrums 9 and 10 (Fig. 2) the former or hoist ing drum serving to controlthe rope 5, and the latter or opening and closing drum serving tocontrol the opening and closing rope 6.

The trolley with its attached bucket is traversed outwardly along theboom by means of the trolley rope 11, herein fixed to the outer end ofthe trolley carriage, whence it passes to the end of the boom over theguide sheave l2, and thence back to the tower overthe guide sheave 13,and thence downwardly to the trolley drum' 14. The

trolley drum is driven by anysuitable motor, herein the electric motor15.

It will be observed that the bucket whether loaded or unloaded exerts aninward pull ropes and 6, tending to traverse the trolley inwardly alongthe boom toward the tower, the outward movement of the trolley beingagainst this inward pull, but the inward movement thereof being in thesame direction as the pull.

Referring first to the device for operating the bucket ropes 5 and 6,the drums 9 and 10 are driven by the bucket motor 16 herein also of theelectric type and adapted forcontrol I upon the trolley through theinclined bucket 9 independently of the control of the motor 15. Thedrums 9 and 10 are journaled loosely on the armature shaft of the motor16, but may be clutched thereto either separately or together by beingforced into engagement with the centrally located clutch member 17 fixedon the armature shaft.

Any suitable clutchbperating devices for clutching the drums to andunclutching them from the motor shaft may be employed, and I have hereinindicated sliding collars 18 with operating connections 19 of thegeneral type described in my Reissue Patent No. 12,085, for forcing thedrums either sepa rately or together into clutching engagement with theshaft.

The clutch-operating connections 19 for the opening and closing drum 10are directly and mechanically connected through the link 20, the rockerarm 21, rocker shaft 22, arm 23, and link 2 L with the clutch-operatinglever 25 at the operators platform 26. The clutch operating connections19 for the holding drum 9 are directly and mechanically connectedthrough the link 27, rocker arm 28, rocker sleeve shaft 29, arm 30, andlink 31 to the clutch-operating lever 32, the two clutch levers 25 and32 being located side by side with space for an operators stand betweenthem so that the operator can conveniently grasp the handle of thelevers and thereby control the clutches for the drums 9 and 10 whilefacing and observing the movement of the bucket. Located also within thecontrol of the operator, while in that position and while grasping theclutch levers, are two foot levers, one, 33 of which is connected tooperate the controller (conventionally indicated at 34) for the hoistmotor, and the other, 35, of which is connected to control a brake 36for the hoist motor.

To operate the controller 34, the bucket lever 33 is connected theretothrough the cable 37, passing over appropriate sheaves, a spring 38being utilized to move the controller to its inactive position when thefoot pressure is relieved. By this means the bucket motor 17 may bestarted or stopped. If desired the motor connections may be such as toafford regenerative braking when the load is being lowered, according tothe principles set forth in my copending application, Serial No. 69879,filed Januar 1916.

The brake 36 for the hoisting motor 1. preferably of the automaticband-brake pat tern of the general type in my prior Patent No.1,123,786, dated January 5, 1915, and is herein shown as encircling abrake drum on the motor shaft. The construction is such that the.automatic contraction of the band normally prevents movement of thebrake drum in a direction which corresponds to the unwinding of theropes from the drums 9 and 10, but permits movement in the oppositedirection. Through the upward move ment of the brake lever 39, which isnormally depressed by the spring 40, the band may be freed to permitunwinding movement of the drums when the latter are clutched to thebrake drum, it being possible for the operator to, vary the control ofthe slippage of the drum within the band, and therefore the un windingmovement, by means of the up ward pressure against the brake lever 39.

For this purpose the latter is connected to be adjustably raised by apiston (not shown) working in the pressure cylinder 41, pressure beingadmitted to or exhausted from the lower end of the cylinder through avalve 50 controlled by the foot lever 35 at the operators stand.

The valve 50 (see Figs. 3 and 10) consists of a two-spool piston valveworking within a valve casing 50" bolted to the side of the pressurecylinder 4.1. The casing is provided with an exhaust port 51 opening tothe atmosphere, and an admission port 52 connected to any suitablesource of pressure fluid supply. An intermediate port 53 in the valvechamber communicates with the lower end of the pressure fluid cylinder41. A run-around passage 54c (indicated in dotted lines in Fig. 10)connects the ports 52 and One end of the valve is opposed by a fixedabutment 55 and a spring 55*, while its opposite end is seated againstthe actuat- 111g plunger rod 56. The opposite end of the plunger entersthe open mouth of sleeve 57 which latter is mounted to slide in a fixedblock and has contained within it, the coiled spring 58 abutting one endagainst the plunger and the opposite end against the closed end of thesleeve.

In the normal position of the valve which is shown in Fig. 10, thesleeve 57 protrudes to its extreme position, allowing the valve to moveaway from the abutment 55, and opening the cylinder port 53 to theexhaust port 51 so that the pressure cylinder exerts no lifting efforton the brake lever 39. The end of the sleeve 57 projects down at thebottom of the casing over a weighted lever arm 59 (Fig. 3) which lattermay be raised to press against the projecting end of the sleeve by meansof the cable 60, the latter passing over suitable sheaves and connectedto the foot lever 35 at the operators stand. When the foot lever 35 isdepressed to lift the weighted arm 59, the spring 58 is compressed,forcing the valve toward its opposite position, whereupon pressure isadmitted to the cylinder port 53 from the admission port 52, therebylifting the piston in the brake cylinder 4-1 and releasing the brake. Atthe same time pressure fluid is admitted through the run-around passage54 to the end of the valve, tending to move the valve back againstpressure at the end of the valve exceeds that of the spring, the valvestarts to close, coming to rest when the pressure of the spring equalsthat of the pressure fluid on the end of the valve. The strength of thespring and the area of the valve are so selected that the valve willrespond to the position of the controlling lever and admit and maintaina predetermined pressure supply in the cylinder 41. Such pressure willbe proportionate to the pressure exerted against the spring 58 so thatthe operators control over the brake band simulates such control wheneffected through direct mechanical connections.

For the control of the trolley there is preferably provided controllingmeans at the operators stand and such controlling means or partsthereof, are preferably mounted on one or more of the bucket controllinglevers so that the operator can control the movement of the trolleywhile still maintaining his grasp upon the bucket levers. In theillustrated embodiment of the invention this is accomplished by mountingon one of the levers, herein the holding lever, a connection so relatedto, the controller for the trolley motor that through the provision of asidewise rocking movement of the lever the controller may be moved tostop, start or reverse the trolley motor.

To this end the trolley motor controller 61, which may be a master ormain controller operating through an intermediate controller if desired,is connected to the coupling 62, the latter mounted on the holdingclutch lever 32 in a bifurcated extension 63 (Figs. 6 and 7) of thelower end or base 64 thereof. The clutch lever 32 is mounted to swingforward and backward to control its clutch about a fulcrum which isprovided by the sleeve 65 journaled in the fixed supporting block 66,the sleeve being provided with an upwardly and outwardly projecting arm67 having ears 6868 between which the base piece 64: of the lever ispivoted for sidewise movement.

The opposite end of the coupling 62 is connected to a sliding rod 69which latter is encircled by the coil spring 70 seated at opposite endsagainst washers 71 and 72. The washers are seated one in the sleeve 65and the other in the corresponding sleeve for the lever 25 so that theiroutward movements are prevented. When the rod 69 is moved endwise,however, either washer may be moved inwardly to compress the springthrough the abutting collar 7 3 or 74 fastened to the rod. The springthus tends to force the rod to. an intermediate or neutral positioncorresponding to that shown in Fig. 6, whereby the lever 32 is broughtto an upright or neutral position and the controller placed in its zeroor off position. When the lever is rocked to one side it compresses thespring 7 0 through the endwise movement of the rod 69 and moves thecontroller to a position in which power is supplied to the trolley motorto wind on the trolley rope. When rocked in the opposite direction thespring is compressed from the opposite end and the controller is movedto a position in which the trolley motor is turned reversely. WVhen theoperator relieves'the pressure of his hand tending to rock the leversidewise, the spring 70 expands and automatically restores the clutchlever t its normal upright position.

The coupling 62 and the rod 69 are preferably substantially coincidentwith the axis about which fore and aft movement of the clutch levertakes place and the coupling is preferably joined or swiveled to theclutch lever as by means of the pin 75. This and the disposition of thetwo pivotal axes of the levers at right angles to each other providesthat the movement of the lever fore and aft for controlling the clutchis without effect on and independent of the movement of the controller,while, on the other hand, the movement of the lever sidewise for theoperation of the controller is without effect on and independent of themovement of the clutch operating connections. The operator is thusenabled to start, stop and reverse the trolley motor by a mere sidewisemovement of the leyer 32 and without interference with his control overthe clutches.

In the hoisting apparatus of the type shown in Fig. 1, the inclinationof the bucket ropes tends constantly to pull the trolley in on the boom.In such an installation, or in any installation where the trolley tendsto be pulled in one direction, as for example by the bucket, someaccurate and complete control is required to prevent the undue acceleration or the racing of the trolley when released, and to avoid seriousaccidents which mightresult therefrom. Where two operators are employed,one for controlling the bucket and a separate one for controlling thetrolley, the regulation of the inward trolley movement can be readilyhad through the provision of a mechanically applied brake, the trolleyoperator customarily using one hand to apply the brake and the otherhand to clutch or unclutch the trolley drum from its motor shaft, and afoot lever to control the trolley motor.

In the case of a one-man control, however, it becomes difficult toprovide for a suitable regulation of this inward movement of the trolleythrough a directly and mechanically trolley in both directions under thecomplete control of the operator at all times, I have provided, incombination with the main controlling elements herein referred to, adevice adapted to regulate the inward or gravitational movement of thetrolley, as well as the outward movement thereof through the control ofthe motor control lever alone, thus reducing the trolley control at theoperators stand to a single element, to wit: the trolley controller, andpermitting all movements of the trolley to be secured through thesidewise rocking movement of this one controlling lever alone.

The device I have utilized in this combition operates on the generalprinciple of a friction load brake between the trolley motor and thetrolley drum, and is adapted to resist the inward pull of the trolley onits drum, except as the drum is positively driven under power in areverse direction by the trolley motor. By this means, the inward orgravitational movement of the trolley will take place only with thereversal of the trolley motor, and will follow the reverse movement ofthat motor whether fast or slow under complete control of the devicewhich controls the supply of power and the reversing of the motor.Through the use of one controlling element for the motor, there fore,the trolley may be completely con trolled and made to followautomatically the movement of the motor in or out, the tendency to racebeing automatically checked, and its movement forced to correspond tothat of the motor.

The principle of the load brake as applied to the trolley drum will beseen from Figs. 8 and 9, where I have shown oln-e form thereof.Referring thereto, the motor shaft 76 for the trolley motor has fixedthereon the disk-shaped members 77 and 78, between which there arecarried the trolley drum 14 and the brake member 79, both susceptible ofrotary and longitudinal movement with relation to the shaft 7 6.

The driving member 77 is provided near its periphery with a series ofteeth 80, which register with the spaces between similar teeth 81 in theopposing face of the drum 14. Each of the teeth 80 and 81 has one sidebeveled and the other side straight, so that the movement of the drivingmember in the direction which tends to draw the trolley out brings theadjacent inclined or beveled walls of the teeth in contact, whilemovement in the opposite direction brings the straight walls of theteeth in contact, sufli cient play or clearance being provided to backthe inclined wall of the tooth 80 away from the adjacent tooth 81.

The intermediate braking member 79 has its end face opposed to afriction surface 82 of the driving member 78, such friction surfacebeing here provided in the form of an annular layer of any suitablefriction material secured to the face of the member 78. The brakingmember 79 at its opposite-side has a conical formation adapted tocooperate with the conical friction surface 83 carried by adjoining endsof the trolley drum 14. The braking member 7 9 is drumshaped, andencircled by the band-brake 8 1, the latter being the type illustratedin my prior patent Reissue 12,0 10, and adapted to be automaticallyapplied to prevent at all times movement of the braking member in thedirection of the arrow shown in Figs. 8 and 9, while at the same timepermitting winding on movement in the opposite direction.

When it is desired to pull the trolley out,

the clutch lever 32 is moved sidewise in the proper direction to startthe motor, and turn the trolley drum 14 in the direction opposite tothat of the arrow shown in Fig. 8. This drives the drum from the drivingmember 77 through engagement between the inclined sides of the teeth 80and 81, the drum being thereby wedged endwise and into engagement withthe braking member 78. The brake 84 on the latter, however, permits thewinding on movement of the drum, so that the trolley follows themovements of the motor.

. WVhen the motor is stopped, the pull of the load on the trolley ropetending to turn the drum reversely in the direction of the arrow (Fig.8), wedges the drum along the shaft and forces the braking member intofurther contact with both the cone friction 83 and the flat frictionsurface 82, securely locking the drum to the braking member, whichlatter is held by this brake against reverse movement. To allow thetrolley to run inward under the force of gravitation, the motor issimply reversed by moving the clutch lever 32 in the opposite direction.This backs the wedge-shaped sides of the teeth 80 away from the teeth81, relieving the wedging effect and permitting the drum to back awayfrom frictional contact with the braking member 79, at the same timerelieving the friction between the braking member and the frictionsurface 82. The drum thereupon follows the movements of the drivingmember 77, allowing the trolley rope to unwind and the trolley to runin. This continues until the wedge-shaped sides of the teeth 81 overtakethe teeth 80, whereupon the further movement of the drum is immediatelychecked. It therefore follows that the drum is automatically checked bythe wedging and braking action, if it starts to run faster than themotor driven member 77, but is always allowed to turn reversely with thereverse movement of such motor driven member.

By this means, I am enabled to completely control the trolley, bothduring its outward movement when more or less power is required to driveit, and during its inward movement when its tendency is to race, allthrough the use of one controlling element for the motor, the trolleyfollowing automatically the movement of the motor in or out, and thetendency to race being automatically checked to correspond to the motormovement. It will be obvious that the application of this principle tothe one-man control of the trolley and the bucket in a hoistingapparatus may be made to installations employing pressure fluid motors,as well as electric motors. The application of the load brake directlyto the rope-winding drum, as well as the employment of the wedging teeth80 and 81 of substantially the same pitch diameter as the frictionsurface on the braking member, makes this device particularly eflicient.

While I have herein shown and described for the purpose of illustrationone specific form of the invention, I wish it to be understood that thesame is not limitedto the form and relative arrangement of parts or thespecific details of construction herein de? scribed, the same beingsubmitted for illustrative purposes only;

. Claims: l p

1. In a hoisting apparatus a one-man controlling device for effectingthe cooperating movements of a hoisting bucket and its traversingsupport comprising a bucket, a bucket motor, a pair of bucket ropesleading upwardly and inwardly from the traversing support, winding drumsand frictions thercfor, friction controlling hand levers directly andmechanically connected to control said bucket frictions, said leversbeing located side by side with an intermediate space between. for theoperator, a traversing support for the bucket, said support beingsubject to an inward pull through said bucket ropes, a traversing rope,a rope winding drum therefor, a traversing motor for turning thedruni, aloadbrake interposed between the motor and the drum whereby, the drum,while driven positively by the motor to traverse the bucket outwardly ischecked as to its movement in theopposite direction and caused to followthe reversemovement of the motor, said load brake comprising a pair ofmembers fixed to the driving shaft and provided one with wedge shapedteeth engaging teeth on the drumand adapted to control the endwisemovement of the drum on its shaft, a braking member normally heldagainst movement in one direction but permitted movement in the oppositedirection, said member having friction surfaces adapted to be broughtinto engagement with the second one of said members fixed on-the shaftand also with the drum on the longitudinal movement of the latter, amotor controller, a mounting for one of the clutch levers. permittingsidewise movement of the lever, and

means mounted on said lever andconnected to the motor controller wherebysidewise movement of said lever will serve to start, stop and reversethe trolley motor whereby the cooperating movements of the bucket andits traversed support may be simultaneously but independently controlledby the same operator. i i

. 2. In a hoisting apparatus a one-man controlling device for effectingthe'coiiperating movement ofv a hoisting bucket and its traversingsupport comprising albucket motor, a pair of bucket ropes leadingupwardly and inwardly from the traversing support, winding drums andfrictions therefor, friction. controlling hand levers directly 'andmechanically connected to control said bucket frictions, said leversbeing locatedside by side with an intermediate space between for theoperator, a traversing support for the bucket, said support beingsubject toan inward pull through said bucket ropes, a traversin g rope,a rope winding drum therefor, a traversing motor for turning the drum, aload brake interposed between the motor and the drum and so related tothe drum that the latter while driven positively by the motor totraverse the bucket outwardly is checked as to its movement in theopposite direction and caused to follow the reverse movement.

of the motor, a motor controller, a mounting for one of the clutchlevers permitting sidewise movements of. the lever, and means mounted onsaid lever and connected to the motor controller whereby sidewisemovement of said lever will serve to start, stop and reverse the trolleymotor whereby the cooperating movements of the bucket and its traversedsupport may: be simultaneously but independently controlled by the, sameoperator. V V

3. In a hoisting ap iaratus a one-man controlling devicefor e ecting thecooperating movement of a hoisting bucket andits traversing supportcomprising a bucket motor, a pair of bucket ropes leading upwardlyandinwardly from the traversing support, winding drums and frictionstherefor, friction controlling hand levers directly and meload brakeinterposed between the motorand the drum whereby the drum while drivenpositively by the motor to traverse the bucket outwardly is checked astoits movement in the opposite direction and caused to follow the reversemovement of the motor, said load brake comprising a'pair of membersfixed to the driving shaft and'provided one with wedge shaped teethengaging teeth on the drum and adapted to control the endwise movementof the drum on its shaft, a braking member normally held againstmovement in one direction but permitting movement in the oppositedirection, said member having friction surfaces adapted to be broughtinto engagement with the second one of said members fixed on the shaftand also with the drum on the longitudinal movement of the latter, amotor controller and means mounted on one of the clutch levers andadapted to be controlled by the operator while holding said levers forstarting, stopping and reversing said motor through said controllerwhereby the cooperating movements of the bucket and its traversedsupport may be simultaneously but independently controlled by the sameoperator.

4. In a hoisting apparatus a one-man controlling device for effectingthe cooperating movement of a hoisting bucket and its traversingsupport, comprising a bucket motor, a pair of bucket ropes leadingupwardly and inwardly from the traversing support, winding drums andfrictions therefor, friction controlling hand levers directly andmechanically connected to control said bucket frictions, said leversbeing located side by side with an intermediate space between for theoperator, a traversing support for the bucket, said support beingsubject to an inward pull through said bucket ropes, a traversing rope,a rope winding drum therefor, a traversing motor for turning the drum, aload brake interposed between the motor and the drum and so related tothe drum that the latter while driven positively by the motor totraverse the bucket outwardly is checked as to its movement in theopposite direction and caused to follow the reverse movement of themotor, motor controlling means at the operators stand connected to themotor controlling means for starting, stopping and reversing the trolleymotor, said trolley controlling means being adapted to be controlled bythe same operator while holding the clutch levers whereby thecooperating movements of the bucket and its traversed support may besimultaneously but independently controlled by the same operator.

5. In a hoisting apparatus'a one-man con trolling device for effectingthe cooperating movement of a hoisting bucket and its traversing supportcomprising a bucket, a bucket motor, a pair of bucket ropes, the drafton said ropes tending to traverse said support in one direction, awinding drum for the bucket ropes, frictions controlling said drums,friction controlling hand levers located side by side with anintermediate space for the operator, a traversing support for thebucket, a traversing rope, a rope winding drum, a reversing motor forturning the drum to traverse the support against the draft of the bucketropes, a load brake so related to the drum that the latter while drivenpositively by the motor to traverse the bucket outwardly is checked asto its movement in the opposite direction and caused to follow thereverse movement of the motor, motor controlling means, and trolleycontrolling means at the operators stand for controlling the motor,controlling means to start, stop and reverse the trolley motor wherebythe cooperating movement of the bucket and its traversed support may besimultaneously but independently controlled by the same operator.

6. In a hoisting apparatus the combination with a bucket of a bucketmotor, a pair of bucket ropes leading upwardly and inwardly from thetraversing support, winding drums and frictions therefor, frictioncontrolling hand levers, a traversing support for the bucket subject toan inward pull through said bucket ropes, a traversing rope,

a rope winding drum therefor, a reversing motor for turning thetraversing drum, a load brake interposed between the motor and the drumand so related to the drum that the latter while driven positively bythe motor to traverse the bucket outwardly is checked as to its movementin the opposite direction and caused to follow the reverse movement ofthe motor, a motor controller for the trolley motor, and means foroperating said motor to stop, start and reverse said trolley motor.

7. In a hoisting apparatus, the combination with a trolley of. a bucketsustained thereby, a trolley rope and rope winding drum, a reversingmotor for turning said drum, a controller to start, stop and reversesaid motor, a load brake interposed between the motor and trolley ropewinding drum, and means for controlling the bucket.

8. In a hoisting apparatus the combination with a bucket and controllingmeans therefor, of a traversing support for the bucket, said supporttending constantly to be moved in one direction, a traversing motor formoving the support in the opposite direction, a load brake interposedbetween the motor and the support and so related to the latter that thesaid traversing support is stopped and caused to follow the movement ofthe motor when the latter is reversed, and means for starting, stoppingand reversing said traversing motor.

9. The combination with a bucket and bucket ropes and controllingdevices therefor including a pair of controlling levers, of a traversingsupport for said bucket tending constantly to be moved in one direction,a reversing motor for moving said traversing support, a load brakeinterposed between the motor and the support whereby the latter may bemoved positively by the motor in one direction while its normal tendencyto move in the opposite direction may be checked and it may be caused tofollow the reverse power driven movement of the motor, a

motor controller for starting, stopping and "with the trolley motor, andmeans for controlling said motor.

11. In a one-man controlling devlce for a holsting devlce, thecombinatlon wlth a bucket of bucket ropes and a pair of frictioncontrolling levers therefor arranged side by side with an operatorsstand between the same, a traversing support tending constantly to movein one direction, a reversing motor for moving said support in-theopposite direction, a device to hold said support against movement insaid opposite direction except when positively driven by said motor, butcausing it to follow the reverse'movement of themotor in said oppositedirection, a controllerfor said motor, and means for operating saidcontroller including a member connected to a bucket friction lever atthe operators stand.

12. In a one-man controlling apparatus for hoisting machinery, thecombination of a bucket, a pair of controlling levers therefor arrangedat the operators stand, a traversing sup-port for the bucket, atraversing motor therefor, a load brake for the motor,

controlling means for starting, stopping and reversing said motor, andmeans at the operators stand adapted to be controlled by the sameoperator while holding said bucket controlling levers for'operating saidtrolley controller.

' 13. In a hoisting apparatus a one-man :controlling device foreffecting the cooperating movement of a hoisting bucket and a traversingsupport comprising a bucket, a bucket motor, a pair of bucket ropes,winding drums and frictions therefor, friction controlling hand leverslocated side by side with an intermediate space for the operator, atraversing support for the bucket, said support being constantlyimpelled in one direction, a traversing rope and a rope winding drumtherefor, a traversing motor for turning the drum, means for operatingthe trolley in either direction, and

means for controlling said trolley operating means including a memberconnected to one of said friction levers and operated by sidewisemovement thereof.

14. In 'a hoisting apparatus a one-man controlling device for effectingthe cooperating movements of a bucket with a traversing support, abucket, a pair of bucket controlling levers, a; traversing support forthe bucket subject to a. constant pull in one direction, a traversingmotor for moving said support in the o posite direction, and trolleycontrolling means including a member connected to one of said bucketlevers and operated by sidewise movements thereof.

15. In a one-man controlled device for hoisting apparatus thecombinationwith a bucket and bucket operating levers of a traversing support for abucket subject to a pull of the bucket tending to move the support inone direction, a motor for moving the support in the opposite direction,means for automatically checking the movement of the support in thedirection of bucket pull, I

and means for controlling the trolley movement including a deviceadapted to bemoved by the sidewise movement of onerof said bucketoperating levers.

16. In a oneman controlled hoisting apparatus, the combinationwith abucket of a trolley, a trolley rope, a rope windingdrum, a driving motorfor the drum, and a load brake interposed between the motor and thedrum. L r

17. In a one-man controlled hoisting apparatus, the combination with abucket element of a trolley element, a rope winding drum forone of saidelements, a drum shaft,

and load brake mechanism mounted on the drum shaft.

18. Ina one-man controlled hoistingapparatus, the combination with abucket element of a trolley element,'a rope winding drum for one of saidelements, a driving member therefor having drivlng teeth interlockingwith teeth on the drum, said drum being moved axially when turnedreversely by its rope more rapidly than the movement being'moved'axially when turned reversely by its rope more rapidly than the movement'of the driving member, and braking means to check the-unwindingmovement of said drum when moved axially, sald means ncludmg a memberadapted to rotate with "said driving member and'a'braking member"intermediate said member and said drum' and presentlng frictionsurfaces adapted to engage with corresponding friction surfaces on bothsaid member and said drum when the latter is moved axially.

paratus, the combination with a bucket element, of a trolley element, arope winding drum for one of said elements, a driving member therefor,and a load brake of which said winding drum forms a part.

21. In a one-man controlled hoisting apparatus, the combination with abucket element and trolley element of a load brake for one of saidelements, a driving member, a driven member, and a braking member withwhich said driven member is frictionally engaged, said driving memberand driven member having interlocking wedge shaped teeth atapproximately the same radial distances from the axis of rotation as thefriction surfaces are located.

22. In a one-man controlled hoisting device the combination with atrolley and a bucket of a controlling lever for jointly controlling themovements of the trolley and bucket, said lever having both a forwardand a lateral movement, and a centering device tending normally toreturn said lever sidewise to a neutral position,

23. In a one-man controlled hoisting apparatus, the combination with atrolley and a bucket of a OOIltIOlling lever for jointly controlling themovements of the trolley and bucket, said lever having a movementforward and backward about a principal fulcrum, a second fulcrum forsaid lever by which sidewise movement is permitted in either direction,and a spring centering device normally tending to bring said lever toits neutral position about said second fulcrum.

24. In a one-man controlled hoisting apparatus, the combination with atrolley and a bucket of a controlling lever for jointly controlling themovements of the trolley and bucket, said lever having a movementforward and backward and having also a secondary controlling movementsidewise in either direction and a spring centering device tending tohold said lever against sidewise movement.

25.-In a hoisting apparatus, the combination with a bucket of atraversing support on which the bucket is carried, a controlling leverfor controlling both the bucket and the trolley, said lever beingadapted to be moved forward and backward for the control of one elementor to be rocked sidewise in the other direction for the control of theother element, and a centering spring tending to oppose sidewisemovement and maintain the lever normally in a neutral position.

26. In acne-man controlled hoisting apparatus, the combination with atrolley and a bucket of a controlling lever therefor having a mainfulcrum about which said lever is movable, a joint in said lever betweenthe handle thereof and the main fulcrum providing a fulcrum for sidewisemovement a main fulcrum about which said lever is movable, and asecondary fulcrum at right angles thereto at one side of the mainfulcrum, said lever being movable sidewise about the said secondaryfulcrum, a connection to said lever at substantially the axis of themain fulcrum, and a spring for maintaining said lever at substantiallyright angles to said main fulcrum.

28. In a one-man controlled hoisting apparatus, the combination with atrolley and a bucket, of a controlling lever for jointly controlling themovements of the trolley and bucket, the latter having a main fulcrumabout which said lever is movable, and a secondary fulcrum at rightangles thereto at one side of said main fulcrum, said lever beingmovable sidewise about the said secondary fulcrum, a connection to saidlever at substantially the axis of the main fulcrum, an axial rodsecured to said main lever, and a spring adapted to be flexed by themovement of said lever sidewise in either direction about said secondaryfulcrum.

29. In a one-man controlled hoisting apparatus, the combination with atrolley and a bucket of a controlling lever for jointly con trolling themovements of the trolley and bucket, the latter having a main fulcrumabout which said lever is movable, and a sec ondary fulcrum at rightangles thereto at one side of said main fulcrum, said lever beingmovable sidewise about the said secondary fulcrum, a connection to saidlever arranged substantially axially of said main fulcrum to be moved bysaid sidewise movement, a lateral rod connected to said lever, a springencircling said rod, and means carried by said rod for compressing saidspring in either direction when said lever is rocked sidewise in eitherdirection.

30. In a hoisting apparatus, the combination with a bucket, bucket ropesand rope winding drums, a driving member and controlling devices for thebucket including a friction for each drum, and means for frictionallyclutching either drum at will to said driving member, a brakecontrolling the reverse movement of the driving member, and means forapplying or releasing said brake at will.

31. In a hoisting apparatus, a one-man controlling device for effectingthe cooperating movements of a hoisting bucket and its traversingsupport, comprising a bucket, a bucket motor, a pair of bucket ropes,the draft on said ropes tending to traverse said support in onedirection, Winding drums for the bucket ropes, frictions controllingsaid drum friction, controlling hand levers located side by side with anintermediate space for the operator, a traversing support for thebucket, a traversing rope, a rope Winding drum therefor, and a singlecontrolling member mounted on one of the clutch levers and connected tocontrol the movement of the traversing support both with and against thedraft of said ropes.

32. In a hoisting apparatus, a one-man controlling device for effectingthe cooperating movements of a hoisting bucket and its traversingsupport, comprising a bucket, a bucket motor, a pair of bucket ropes,the draft on said ropes tending to traverse said support in onedirection, Winding drums for the bucket ropes, frictions controllingsaid drum friction, controlling hand levers located side by side With anintermediate space for the operator, a traversing support for thebucket, a traversing rope, a rope- Winding drum therefor, and a singlecontrolling member connected to control the movement of the traversingsupport both with and against the draft of said ropes.

In testimony whereof, I have signed my name to this specification.

ALMON E. NORRIS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

It is hereby certified that in Letters Patent No. 1,304,359, granted May20,

1919, upon the application of Almon E. Norris, of Brookline,Massachusetts, for an improvement in Hoisting Apparatus, errors appearin the printed specification requiring correction as follows: Page 8,line 61, claim 26, strike out the Word therefor and insert the Words forjointly controlling the movements of the trolley and bucket, said lever;same page, line 73, claim 27, strike out the Words hoisting device; andthat the said Letters Patent should be read with these correctionstherein that the same may conform to the record of the case in thePatent Ofiice.

Signed and sealed this 17th day of June, A. D., 1919.

[SEAL.] J. T. NEWTON,

Commissioner of Patents.

